In order to obtain simultaneously and efficiently nonlinear wavetransformations in a harbor or coastal region, details of three dimensional flowaround structures and hydrodynamic loads of wave on marine structures,combining advantages of Boussinesq model and NS-VOF model, we unfolded thestudy of establishing Boussinesq / NS coupled numerical models.
Dynamic triaxial tests are carried out to stimulate wave actions, results of which show that strength of silty soil is weakened under actions of cyclic loads and as a result of reduction of strength indexes the weakened silty soil tends to slide under the shearing actions of waves;
The first part of the dissertation is laboratory experiment about the silty soils liquefaction from cyclic loads. Here the devices was designed by author himself and the cyclic air pressure was used to simulate waves.
Sediment layer with biogenic features and zoobenthos activities of feed, build channels and burrows vary the grain size, structure of sediments, physical, mechanical and hydraulic properties, which causes the variation of wave loading effect, stress and seepage in sediments.
Wave loading is a primary loading in oceanic engineering. So it is very important to investigate the dynamic behavior of calcareous sand for promoting the mechanical properties research level, guiding the analysis of sea bed stabilization, directing the design and construction of practical projects.
The experimental method, research thought and calculation method will supply the significant help for the quantitative research of the load disturbance in the borehole, the mechanical nature of rock, establishing observation technical standard and observation criterion and so on.
The effects of different viscous damping diameters, inlet pressures of pipe rupture valve, and elevator loads on the hydraulic elevator system's dynamic performance are analyzed.
The research about hysteresis characteristic of finger seal (FS), which was carried out based on the model with static loads, could not reflect the dynamics behavior of FS system when the rotor runs at high speed.
Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain softening
Volumetric loads of TN dropped dramatically and effluent TN concentration increased quickly when the concentration of average dissolved oxygen was more than 4.0 mg/L.
It is found that stabilization of the optimum specific substrate loads provides the maximum economic coefficient of the process.